CN110047605B - Nuclear critical safety storage tank - Google Patents
Nuclear critical safety storage tank Download PDFInfo
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- CN110047605B CN110047605B CN201910393956.5A CN201910393956A CN110047605B CN 110047605 B CN110047605 B CN 110047605B CN 201910393956 A CN201910393956 A CN 201910393956A CN 110047605 B CN110047605 B CN 110047605B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/40—Arrangements for preventing occurrence of critical conditions, e.g. during storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- High Energy & Nuclear Physics (AREA)
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a nuclear critical safety storage tank which comprises a storage tank outer cylinder and a plurality of neutron absorbers, wherein the neutron absorbers are uniformly distributed in the storage tank outer cylinder. The nuclear critical safety storage tank can reduce the size of the storage tank and the occupied area on the premise of meeting the stored critical safety standard when the amount of the liquid material in the storage tank is large.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear critical safety storage tank.
Background
The feed liquid treated in the nuclear fuel post-treatment process contains fissile substances, the feed liquid needs to be stored in a storage tank in the treatment process, and the fissile substances in the feed liquid stored in the storage tank have critical safety risks, so that the structural form and the storage volume of the storage tank need to reach the critical safety standard through critical safety calculation to avoid supercritical events.
The common method for reducing the supercritical event caused by the feed liquid containing the fissile material and reaching the critical safety standard comprises the following steps: reducing the mass and concentration of fissile materials, using neutron absorbing materials capable of absorbing neutrons in large quantities, controlling the size of process equipment systems, and the like.
When the amount of the stored feed liquid containing the fissile materials is small, an annular groove with a simple structure can be generally used, namely, the feed liquid is stored in an annular cavity, and neutron absorbing materials are filled in the middle of the inner ring. When the amount of the feed liquid containing the fissile material to be stored is large, the annular groove is overlarge in appearance size under the condition that the critical safety requirement can be met, and the requirements of plant buildings and equipment arrangement cannot be met. In general, the processing capacity of the feed liquid containing fissile materials in the nuclear fuel post-processing plant is large, and the size and the processing capacity of the conventional annular groove cannot meet the use requirements of the nuclear fuel post-processing plant of the spent fuel of the nuclear power station.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a nuclear critical safety storage tank, which can reduce the size of the storage tank and make the occupied area relatively small on the premise of meeting the storage critical safety standard when the amount of the liquid material in the storage tank is large.
In order to solve the technical problems, the invention adopts the following technical scheme:
a nuclear critical safety storage tank comprises a storage tank outer cylinder and a neutron absorber,
the neutron absorbers are distributed in the outer storage tank barrel uniformly.
Preferably, a plurality of the neutron absorbers are arranged on the bottom surface of the storage tank at equal intervals.
Preferably, the tank outer cylinder is cylindrical, the neutron absorber is cylindrical, and the plurality of neutron absorbers are equidistantly distributed on different concentric circles of the bottom surface of the tank around the center of the tank outer cylinder.
Preferably, the outer storage tank barrel is cylindrical, the neutron absorbers are cylindrical, and the plurality of neutron absorbers are distributed on the bottom surface of the storage tank from inside to outside at equal intervals in a regular hexagonal manner with the center of circle of the outer storage tank barrel as the center.
Preferably, the neutron absorber includes a vertical tube and a neutron absorbing material filled in the vertical tube.
Preferably, the outer wall surface of the side wall of the outer cylinder of the storage tank is provided with a neutron absorbing material.
Preferably, the nuclear critical safety storage tank further comprises a feed liquid inlet and a feed liquid outlet, the feed liquid inlet is formed in the top of the side wall of the outer cylinder of the storage tank, the bottom surface of the storage tank is obliquely arranged, and the feed liquid outlet is formed in the bottom surface of the storage tank and is located at the lowest position of the bottom surface of the storage tank.
Preferably, the nuclear critical safety storage tank further comprises a bubbling pipe, gas can be injected into the outer cylinder of the storage tank through the bubbling pipe,
one end of the bubbling pipe extends out of the top of the storage tank to form a bubbling air pressure pipe inlet, the other end of the bubbling pipe extends into the bottom of the storage tank, and the bubbling pipe is coiled in gaps among the neutron absorbers.
Preferably, the bubbling pipe is provided with a small bubbling pipe hole,
and gas entering the bubbling pipe can be blown into the outer cylinder of the storage tank through the small holes of the bubbling pipe.
Preferably, the nuclear critical safety storage tank also comprises a monitoring instrument and a valve arranged on the bubbling pipe,
the monitoring instrument comprises a sensor and a controller, a flow threshold value is arranged in the controller,
the sensor is positioned inside the outer cylinder of the storage tank and is used for monitoring the gas flow in the bubbling pipe and transmitting the monitored flow value;
and the controller is electrically connected with the sensor and the valve respectively and is used for comparing the received flow value with the flow threshold value and controlling the opening of the valve according to the comparison result.
On the premise of meeting the critical safety standard, the nuclear critical safety storage tank has a small external dimension (compared with the prior art), so that the nuclear critical safety storage tank has a relatively small occupied area, is convenient to install, and can meet the requirements of the conventional factory buildings and equipment arrangement.
Specifically, the nuclear critical safety storage tank has the following beneficial effects:
1. a plurality of neutron absorbers are uniformly arranged in the nuclear critical safety storage tank, neutron absorbing materials are filled in the neutron absorbers, the neutron absorbing materials can absorb neutrons in feed liquid containing fissile materials, critical safety of the feed liquid stored in gaps of the neutron absorbers in an outer cylinder of the storage tank is ensured, the nuclear critical safety storage tank can occupy a small area, and large-volume feed liquid containing fissile materials can be stored;
2. neutron absorbers containing neutron absorbing materials are uniformly distributed in the outer cylinder of the storage tank, so that the interaction of the neutron absorbing materials and neutrons generated by fissile materials in the feed liquid is facilitated;
3. the neutron absorption material is also arranged on the outer wall surface of the side wall of the outer cylinder of the storage tank, so that the influence of the reflection and interaction of neutrons in fissile materials in the outer cylinder of the storage tank can be overcome, and the risk of supercritical events is further reduced;
4. the nuclear critical safety storage tank is also provided with a bubbling pipe and a bubbling pipe small hole, and air is injected into the storage tank outer cylinder through the bubbling pipe and the bubbling pipe small hole, so that the full mixing of feed liquid and the absorption of neutrons generated by the easy-to-fission substances by the neutron absorbing material are facilitated, and the inside of the storage tank outer cylinder reaches the critical safety standard.
Drawings
Fig. 1 is a front view of a nuclear critical safety tank according to embodiment 1 of the present invention;
FIG. 2 is a top plan view of the nuclear critical safety sump of FIG. 1;
FIG. 3 is a top view of another alternative embodiment of the bubbling stirring tank for nuclear critical safety storage according to the present invention;
fig. 4 is a top view of a nuclear critical safety sump according to example 2 of the present invention.
In the figure: 1-a storage tank outer cylinder; 2-a neutron absorber; 3-the sump floor; 4-bubbling air pressure pipe inlet; 5-feed liquid inlet; 6-a feed liquid outlet; 7-bubbling tube; 8-bubbling tube orifice.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
The invention provides a nuclear critical safety storage tank, which comprises a storage tank outer cylinder and a neutron absorber,
the neutron absorbers are distributed in the outer storage tank barrel uniformly.
Example 1
As shown in fig. 1, the present embodiment discloses a nuclear critical safety tank, which includes a tank outer casing 1 and a plurality of neutron absorbers 2, wherein the neutron absorbers 2 are distributed uniformly inside the tank outer casing 1.
The number of the neutron absorbers 2 is determined according to the concentration and the total amount of fissile materials in the feed liquid to be stored in the actual situation. In the nuclear critical safety storage tank in the embodiment, the plurality of neutron absorbers 2 are arranged in the storage tank outer cylinder 1, the neutron absorbers 2 are filled with neutron absorbing materials, the plurality of neutron absorbers 2 can increase the specific surface area of the neutron absorbing materials contacting with the feed liquid, neutrons generated by fissile materials in the feed liquid in the fission process are absorbed, the situation that the fissile materials reach a critical state is avoided, and the storage requirement of the feed liquid under the condition that the concentration of the fissile materials is high can be met. In addition, although a plurality of neutron absorbers 2 are filled in the outer cylinder 1 of the storage tank, the storage volume of the feed liquid has greater advantages compared with that of an annular groove, and the requirement of the feed liquid storage with larger treatment capacity can be met; the nuclear critical safety storage tank of the embodiment can ensure that the concentration of fissile substances in the feed liquid in the outer cylinder 1 of the storage tank reaches the critical safety standard, and meanwhile, the storage volume of the nuclear critical safety storage tank to the feed liquid can be increased, and the size and the occupied area of the nuclear critical safety storage tank are relatively small, so that the installation is convenient.
Preferably, boron is used as the main component of the neutron absorbing material.
In this embodiment, the neutron absorber 2 includes the standpipe and fills in the inside neutron absorbing material of standpipe, and is specific, and the standpipe can be the stainless steel standpipe, and inside the filling of stainless steel standpipe contains the cement or the polyethylene material of neutron absorbing material.
The storage tank outer cylinder 1 comprises a storage tank outer cylinder side wall and a storage tank bottom surface 3, and the storage tank outer cylinder side surface and the storage tank bottom surface 3 are integrally formed.
Preferably, in the present embodiment, a plurality of neutron absorbers are disposed on the tank bottom surface 3 at equal intervals, so that the neutron absorber 2 is uniformly distributed in the tank outer cylinder 1, and thus the neutron absorber 2 is compactly distributed in the tank outer cylinder 1, which can save space.
The outer shape of the storage tank outer cylinder 1 can adopt various shapes, such as rectangle, square, cylinder and the like; the neutron-absorber 2 may take one or more shapes, such as one or more of a cylindrical shape, a conical shape, and a spherical shape, and the neutron-absorber 2 may take a cylindrical shape in common use.
Preferably, in the present embodiment, as shown in fig. 1 and 2, the outer shape of the tank outer tube 1 is a cylindrical shape because it has a hollow interior, the shape is a cylindrical shape, the cross-sectional shape of the neutron absorber 2 is a circular shape, and the plurality of neutron absorbers 2 are equidistantly distributed on different concentric circles of the tank bottom surface 3 around the center of the tank outer tube 1.
When the space in the tank outer tube 1 is not suitable for installing the neutron absorber 2 having a circular cross section, the neutron absorber 2 having an elliptical cross section may be used instead of the neutron absorber 2 having a circular cross section. For example, in fig. 2, there are two types of cross-sectional shapes of the neutron absorber 2 at the outermost layer, which are circular and elliptical, and when setting, the neutron absorber 2 with the circular cross-section is first set, and then the neutron absorber 2 with the elliptical cross-section is set, wherein the setting direction of the neutron absorber 2 with the elliptical cross-section is flexibly set according to the shape of the remaining position of the storage tank outer cylinder 1, and the distance between the neutron absorber 2 with the elliptical cross-section and the neutron absorber 2 with the adjacent circular cross-section is set to be slightly smaller than the distance between the neutron absorbers with the adjacent circular cross-sections.
In the present embodiment, as shown in fig. 3, the tank outer tube 1 is cylindrical, the neutron absorber 2 has a circular cross-sectional shape, and a plurality of neutron absorbers 2 are equidistantly distributed on the tank bottom surface 3 from the inside to the outside in a regular hexagonal shape around the center of the tank outer tube 1. Relevant parameters in the nuclear critical safety storage tank are designed according to the concentration and the volume of the treatment feed liquid in the actual working process, and the parameters comprise the size of the storage tank outer cylinder 1, the size of the neutron absorbers 2 and the number of the neutron absorbers 2, and the distribution of each neutron absorber 2 in the storage tank outer cylinder 1; and then, calculating whether the designed storage tank can meet the critical safety requirement of the material liquid in the actual storage working process by adopting a critical safety calculation program of a Monte Carlo method, and adjusting the designed parameters in the nuclear critical safety storage tank until the designed nuclear critical safety storage tank can ensure that the material liquid to be processed can meet the critical safety standard. That is, in the present embodiment, the distribution of the plurality of neutron absorbers 2 in the tank outer tube 1 should satisfy the requirements of the critical safety calculation program of the monte carlo method.
Preferably, the outer wall surface of the side wall of the storage tank is also provided with a neutron absorbing material, and the neutron absorbing material on the outer wall surface of the side wall of the storage tank can overcome the influence of reflection and interaction of neutrons in fissile materials in the outer cylinder 1 of the storage tank, so that the risk of supercritical events can be further reduced.
The nuclear critical safety storage tank further comprises a feed liquid inlet 5 and a feed liquid outlet 6, wherein the feed liquid inlet 5 is arranged at the top of the side wall of the storage tank, the bottom surface 3 of the storage tank is obliquely arranged, the feed liquid outlet 6 is arranged on the bottom surface 3 of the storage tank and is positioned at the lowest position of the bottom surface, the feed liquid in the outer cylinder 1 of the storage tank can directly flow out through the feed liquid outlet 6 positioned at the lowest position of the inclined surface, and the accumulation of the feed liquid in the outer cylinder 1 of the storage.
Preferably, the included angle between the inclined bottom surface of the storage tank bottom surface 3 and the horizontal plane is 5 degrees, so that complete emptying of the feed liquid can be ensured, accumulation of fissile materials is avoided, and the problem of poor stability of the whole storage tank outer barrel 1 caused by the fact that the inclined angle of the storage tank bottom surface is too large is also avoided.
Preferably, as shown in fig. 3, the nuclear critical safety reservoir further comprises a bubbling tube 7, and gas can be injected into the reservoir outer cylinder 1 through the bubbling tube 7. Wherein, one end of the bubbling pipe 7 extends out of the top of the storage tank outer cylinder 1 to form a bubbling compressed air pipe inlet 4 (as shown in figure 1), the other end extends into the bottom of the storage tank outer cylinder 1, and the bubbling pipe 7 is coiled in the gaps of the neutron absorbers 2. After the gas injected into the bubbling pipe 7 enters the storage tank outer cylinder 1, the bubbles generated by the gas can stir the feed liquid when rising in the feed liquid, so that the feed liquid in the storage tank outer cylinder 1 can be uniformly mixed.
Preferably, the bubbling tube 7 is provided with a plurality of bubbling tube small holes 8, the number of the bubbling tube small holes 8 is multiple, the plurality of bubbling tube small holes 8 can be arranged along the length direction of the bubbling tube 7, and the gas entering the bubbling tube 7 can be respectively blown into the storage tank outer cylinder 1 through the plurality of bubbling tube small holes 8, so that the liquid and the liquid can be mixed in the storage tank outer cylinder 1. When the materials are required to be added and mixed in the outer cylinder 1 of the storage tank, the gas in the bubbling pipe 7 can be blown into the outer cylinder 1 of the storage tank through the small holes 8 of the bubbling pipe, so that the aim of stirring the material liquid is fulfilled.
Preferably, the gas entering the bubbling tube 7 is air.
Preferably, the nuclear critical safety storage tank further comprises a monitoring instrument and a valve arranged on the bubbling pipe 7, wherein the monitoring instrument comprises a sensor and a controller, and a flow threshold value is arranged in the controller. The size of the flow threshold is set according to the specific size of the sump. Wherein, the sensor is positioned inside the outer cylinder 1 of the storage tank and is used for monitoring the gas flow in the bubbling pipe 7 and transmitting the monitored flow value; and the controller is respectively and electrically connected with the sensor and the valve, is used for receiving the flow value, comparing the received flow value with the flow threshold value, and controlling the opening of the valve according to the comparison result, so that the gas flow in the bubbling tube 7 can be controlled finally. The monitor meter and the valve in the embodiment are used for monitoring the actual gas flow input by the bubbling pipe 7 in the material liquid in the outer cylinder 1 of the storage tank, and the gas flow blown into the bubbling pipe 7 of the outer cylinder 1 of the storage tank can be adjusted by controlling the opening of the valve.
The structural distribution and operation of a nuclear critical safety reservoir of a particular size will be described in detail below by way of example. Here, the tank outer tube 1 is cylindrical, and the distribution of the neutron absorbers 2 in the tank outer tube 1 will be described in detail. In this example, the outer diameter of the sump side wall is 2360mm and the height is 1037mm, and the thickness of the neutron absorbing material on the outer wall surface of the sump side wall is 100 mm. Firstly, arranging a neutron absorber 2 with a circular cross section at the center of a storage tank outer cylinder 1, enabling the center of the neutron absorber 2 with the circular cross section to coincide with the center of the storage tank outer cylinder 1, and then distributing a plurality of neutron absorbers 2 with circular cross sections on a storage tank bottom surface 3 from inside to outside in an equi-spaced mode in a regular hexagon mode, wherein the distance between every two adjacent neutron absorbers 2 with circular cross sections is 50 mm; the neutron absorbers 2 form 3 regular hexagons (except the neutron absorber 2 arranged at the center of a circle) together, and the number of the neutron absorbers forming the regular hexagons at the outer layer is 5 more than that of the neutron absorbers forming the regular hexagons at the inner layer in every two adjacent regular hexagons; meanwhile, because the gap between the neutron absorber at the vertex position of the outermost regular hexagon and the edge of the storage tank outer cylinder 1 is narrow and not suitable for arranging the neutron absorber 2 with the circular cross section, the neutron absorbers 2 with the elliptical cross section are adopted for the neutron absorbers 2 at 6 vertexes of the outermost regular hexagon to replace the neutron absorbers 2 with the circular cross section, wherein the diameter of the neutron absorber 2 with the single circular cross section is 275mm, the long axis of the neutron absorber 2 with the elliptical cross section is 273mm, the short axis of the neutron absorber 2 with the single circular cross section is 150mm, and the heights of the neutron absorber 2 with the circular cross section and the neutron absorber 2 with the elliptical cross section are consistent with the height of the storage tank outer cylinder 1. In addition, the distance between two adjacent neutron absorbers with elliptical cross sections and the neutron absorbers with circular cross sections is 49 mm.
The size parameters of the nuclear critical safety storage tank can be calculated by adopting a critical safety calculation program of a Monte Carlo method, and when the calculation result shows that the feed liquid containing the fissile material with the set concentration can meet the storage critical standard requirement, the nuclear critical safety storage tank meeting the use requirement is obtained.
When the nuclear critical safety storage tank in the embodiment is used, feed liquid enters the outer cylinder 1 of the storage tank from the feed liquid inlet 6, wherein when the feed liquid in the storage tank reaches 1900L, the feed liquid is stopped from being injected, meanwhile, air is introduced from the bubbling emptying pipe inlet 4 at the flow rate of 5-15m/s, the air enters the feed liquid after passing through the bubbling pipe 7 and the bubbling pipe small holes 8, the introduced air can fully mix the feed liquid, the neutron absorbing material in the feed liquid neutron absorber 2 absorbs neutrons generated in the fission process of the fissile material in the feed liquid, and the fissile material can reach the critical safety standard in the storage of the outer cylinder 1 of the storage tank, wherein when the concentration of the fissile material is lower than 20g/L, the critical safety standard can be reached. After the storage is finished, the feed liquid is discharged from the feed liquid outlet 6 for subsequent treatment. The nuclear critical safety storage tank in the embodiment can store up to 1900L of feed liquid on the premise of reaching the critical safety standard, and can only store 900L of feed liquid for the annular groove with the diameter of 2600mm and the height of 1827mm in the prior art for storing the same concentration of feed liquid; in other words, to store 1900L of feed liquid, it is necessary for this embodiment to use a 4536L volume of nuclear critical safety sump in this embodiment, whereas if the same volume of feed liquid is stored using the prior art annular channel, then 2.11 9700L volumes of annular channels are required.
It can be seen that the nuclear critical safety sump of this embodiment has a smaller overall size and a smaller footprint than the prior art annular channel, thereby facilitating installation.
Example 2
The difference between the nuclear critical safety reservoir in this embodiment and embodiment 1 is that the shape of the nuclear critical safety reservoir in this embodiment is different. The plan view is shown in fig. 4 (the bubbling pipe is not shown), in which the outer tank casing 1 in this embodiment has a rectangular parallelepiped shape, the neutron absorber 2 has a square shape, and a plurality of the square neutron absorbers 2 are equidistantly distributed on the bottom surface 3 of the tank. The other structures of the nuclear critical safety tank in this embodiment are the same as those of the nuclear critical safety tank in embodiment 1, and are not described herein again.
In this example, the structural distribution of a nuclear critical safety reservoir of a specific size is described. Wherein, the length of the side wall of the cuboid-shaped storage tank outer cylinder 1 is 2475mm, the width is 1100mm, the height is 1666mm as an example, wherein, the thickness of the neutron absorbing material on the outer wall surface of the side wall of the storage tank outer cylinder 1 is 100mm, the square-shaped neutron absorber 2 arranged on the bottom surface 3 of the storage tank has the neutron absorber 2 with the side length of 200mm and the height of 1666mm, and the distance between two adjacent neutron absorbers 2 is 75mm, the storage tank with the size can store 1200L of feed liquid to reach the critical safety standard by the result of the critical safety calculation by adopting the Monte Carlo method, and if the same concentration of feed liquid is stored, the ring groove with the diameter of 2600mm and the height of 1827mm can only store 900L of feed liquid; in other words, to store 1200L of feed liquid, it is necessary for this embodiment to use a 4535L volume of nuclear critical safety reservoir in this embodiment, whereas if the prior art annular channel is used to store the same volume of feed liquid at the same concentration, it would require 1.33 annular channels of 9700L volume.
Compared with the annular groove with the same effect in the prior art, the nuclear critical safety storage tank in the embodiment ensures the storage capacity, ensures that the feed liquid can be well treated in the storage tank by reasonably arranging the distribution of the neutron absorber 2 in the storage tank outer barrel 1, and has the advantages of simple structure, small volume and convenience in installation and implementation.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. A nuclear critical safety storage tank comprises a storage tank outer cylinder (1), and is characterized in that: also comprises a neutron absorber (2),
the neutron absorbers (2) are uniformly distributed in the outer tank barrel (1), the neutron absorbers are cylindrical, the neutron absorbers (2) are arranged on the bottom surface (3) of the tank at equal intervals,
the feed liquid is arranged in the outer cylinder of the storage tank and is positioned in gaps of the neutron absorbers;
the nuclear critical safety storage tank also comprises a bubbling pipe (7), gas can be injected into the storage tank outer cylinder (1) through the bubbling pipe (7),
one end of the bubbling pipe (7) extends out of the top of the storage tank outer cylinder (1) to form a bubbling compressed air pipe inlet (4), the other end of the bubbling pipe extends into the bottom of the storage tank outer cylinder (1), and the bubbling pipe (7) is coiled in a plurality of gaps of the neutron absorbers (2).
2. The nuclear critical safety sump of claim 1,
the storage tank outer cylinder (1) is cylindrical, and a plurality of neutron absorbers (2) are equidistantly distributed on different concentric circles of the bottom surface (3) of the storage tank by taking the center of the storage tank outer cylinder (1) as the center.
3. The nuclear critical safety sump of claim 1,
the storage tank outer cylinder (1) is cylindrical, and a plurality of neutron absorbers (2) are distributed on the bottom surface (3) of the storage tank from inside to outside at equal intervals in a regular hexagon mode by taking the circle center of the storage tank outer cylinder (1) as the center.
4. The nuclear critical safety sump of claim 1,
the neutron absorber (2) comprises a vertical pipe and a neutron absorbing material filled in the vertical pipe.
5. The nuclear critical safety sump of any one of claims 1 to 4,
the outer wall surface of the side wall of the outer cylinder of the storage tank is provided with neutron absorbing materials.
6. The nuclear critical safety sump of claim 5,
the nuclear critical safety storage tank further comprises a material liquid inlet (5) and a material liquid outlet (6), the material liquid inlet (5) is arranged at the top of the side wall of the outer cylinder of the storage tank, the bottom surface (3) of the storage tank is inclined, and the material liquid outlet (6) is arranged on the bottom surface (3) of the storage tank and is located at the lowest position of the storage tank.
7. The nuclear critical safety sump of claim 1,
the bubbling tube (7) is provided with a small bubbling tube hole (8),
the gas entering the bubbling pipe (7) can be blown into the storage tank outer cylinder (1) through the bubbling pipe small holes (8).
8. The nuclear critical safety sump of claim 7 further comprising a monitoring meter and a valve on the bubbler tube (7),
the monitoring instrument comprises a sensor and a controller, a flow threshold value is arranged in the controller,
the sensor is positioned inside the outer tank barrel (1) and is used for monitoring the gas flow in the bubbling pipe (7) and transmitting the monitored flow value;
and the controller is electrically connected with the sensor and the valve respectively and is used for comparing the received flow value with the flow threshold value and controlling the opening of the valve according to the comparison result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910393956.5A CN110047605B (en) | 2019-05-13 | 2019-05-13 | Nuclear critical safety storage tank |
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| CN201910393956.5A CN110047605B (en) | 2019-05-13 | 2019-05-13 | Nuclear critical safety storage tank |
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| CN110047605B true CN110047605B (en) | 2021-03-02 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3882313A (en) * | 1972-11-07 | 1975-05-06 | Westinghouse Electric Corp | Concentric annular tanks |
| DE2856620C2 (en) * | 1978-12-29 | 1985-06-20 | GNS Gesellschaft für Nuklear-Service mbH, 4300 Essen | Transport and / or storage containers for radioactive waste from nuclear power plants |
| GB9609304D0 (en) * | 1996-05-03 | 1996-07-10 | British Nuclear Fuels Plc | Improvements in and relating to fuel transportation |
| DE19708899C2 (en) * | 1996-07-12 | 1999-06-02 | Gnb Gmbh | Process for transporting and storing spent fuel elements and neutron absorbers for carrying out the process |
| JPH10132989A (en) * | 1996-10-31 | 1998-05-22 | Mitsubishi Heavy Ind Ltd | Solution tank |
| JP2006105741A (en) * | 2004-10-04 | 2006-04-20 | Hitachi Ltd | Radioactive material storage vessel |
| KR20140146204A (en) * | 2012-04-18 | 2014-12-24 | 홀텍 인터내셔날, 인크. | Storing and/or transferring high level radioactive waste |
| FR3041141B1 (en) * | 2015-09-11 | 2017-10-13 | Tn Int | IMPROVED STORAGE DEVICE FOR STORING AND / OR TRANSPORTING NUCLEAR FUEL ASSEMBLIES |
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